The MWRD's GIS and map data includes a wide range of maps and data sets. 

Featured maps and applications include:

Chicago Area Waterways Water Quality Data

Water quality data including fish populations, dissolved oxygen and water chemistry.

MWRD Leasing Property

An interactive map of MWRD real estate, including property for lease.

Industrial Waste Division

Data on industry and the MWRD Industrial Waste Division.

Stormwater Inundation Mapping Application (SWIMA)

MWRD Stormwater Inundatation Data.

Combined Sewer Overflows (CSO)

A public notification program for combined sewer overflows (CSOs) in Chicago area waterways.